DS1077U-120+

Overview

The DS1077U-120+ is a dual-output, programmable fixed-frequency oscillator from Analog Devices/Maxim Integrated. It operates on a single 5V supply and requires no external components. The device features two synchronous outputs (OUT0 and OUT1) with frequencies ranging from 8.1kHz to 133MHz. It utilizes a 2-wire serial interface for on-the-fly frequency programming and stores settings in nonvolatile EEPROM memory. Key electrical parameters include a ±0.5% initial tolerance, ±0.5% variation over temperature (+25°C to +70°C), and an operating temperature range of -40°C to +85°C.

Feature Summary

• Dual low-jitter, synchronous fixed-frequency outputs
• 2-wire serial interface for processor-controlled or standalone operation
• Nonvolatile EEPROM storage for frequency settings
• Single 5V supply operation with power-down mode

Applications

• Processor-controlled frequency synthesizers
• Standalone clock generation for digital systems
• In-circuit on-the-fly frequency adjustment applications

Procurement Notes

Verify the ordering suffix 'U' corresponds to the 8-pin 118mil µSOP package as specified in the datasheet. Confirm the '-120' designation indicates the 120.000MHz master frequency option. Ensure compatibility with the required 2-wire serial interface voltage levels and timing constraints for the specific application environment.

Selection Notes

Select this component when a dual-output clock source with nonvolatile frequency storage is required. The DS1077U-120+ is suitable for designs needing a 120MHz base frequency with programmable submultiples. Consider the 8-pin µSOP package for space-constrained PCB layouts. Verify that the 5V supply voltage aligns with the system power architecture.

Part Context

The DS1077 series includes variants such as DS1077Z-120+ (SO package) and other frequency options like DS1077x-133 and DS1077x-66. The 'U' suffix specifically denotes the 8-pin 118mil µSOP package, while 'Z' denotes the 8-pin 150mil SO package. All variants share the same core functionality but differ in physical footprint and maximum frequency capabilities based on the suffix number.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.